docs: def get_response(self, **kwargs):
          """
          Returns a Response object containing this object's status code and a
          JSON object containing the key "error" with the value of this object's
          error message in the body. Keyword args are passed through to
          the Response.
          """
          return Response(
              json.dumps({"error": self.message}),  # pylint: disable=exception-message-attribute
              status_code=self.status_code,
              content_type="application/json",
              charset="utf-8",
              **kwargs
          )